Overhead hoisting-trolley.



B. S. SPAULDING.

OVERHEAD HOISTING TROLLEY.

APPLICATION FILED JAN. 11, 1913.

1,065,399, Patented June 24, 1913.

0 fig, lnven or 5 a Attorneys COLUMBIA PLANGGRAPH c0.. WASHINGTON, n. C

BENJAMIN SHEPI-IARD SPAULIDING, OF ARGATA, CALIFORNIA.

OVERHEAD I-IOISTING-TROLLEY.

Specification of Letters Patent.

Application filed January 11, 1913.

Patented June 24, 1913.

Serial No. 741,599.

To all whom it may concern:

Be it known that I, BENJAMIN S. SPAUL- DING, a citizen of the UnitedStates, residing at Arcata, in the county of Humboldt and State ofCalifornia, have invented a new and useful Overhead Hoisting-Trolley, ofwhich the following is a specification.

One object of the present invention is to provide a trolley for loggingoperations and the like, so constructed that the same will maintain itsgrip upon the cable-way while the log or other article is being drawnalong the ground, the construction being such that when the log is outof engagement with the ground, the trolley will move readily along thecable-way.

Another object of the invention is to provide a device of this typehaving novel means for adjusting the relative positions between thepulleys which engage, respectively, with the upper and lower edges ofthe cable-way.

It is within the scope of the invention to improve generally and toincrease the utility of devices of that type to which the presentinvention appertains.

With the foregoing and other objects in view which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed it being understood that changes in the preciseembodiment of invention herein disclosed can be made within the scope ofwhat is claimed without departing from the spirit of the invention.

In the drawings :Figure 1 shows one form of the invention in sideelevation; Fig. 2 is a top plan of the structure shown in Fig. 1; Fig. 3is a side elevation showing a modified form of the invention; and Fig. 4is a top plan of the structure shown in Fig. 3.

In carrying out the invention and refer ring particularly to Figs. 1 and2, there is provided a support 1 which preferably consists of parallelbars 2, united at their ends by axles 3. Journaled' for rotation uponthe axles 3 and located bet-ween the bars 2 are primary pulleys 4adapted to engage the upper edge of the track or cable-way 5. De-

pending links 6 lie upon opposite sides of the cable-way 5, the upperends of the links 6 being pivotally supported by the axles 3. Extendedthrough the lower ends of the links 6 are pivot elements 7, supportingthe ends of a yieldable frame, denoted generally by the numeral 8. Theframe 8 comprises upper bars 9, the outer ends of which are pivotallysupported upon the members 7, and lower bars 10, similarly mounted attheir outer ends. The adjacent ends of the upper bars 9 are pivotallyconnected by an axle 11 upon whlch is journaled for rotation a secondarypulley 12. The bars 9 and 10 are disposed in pairs, transversely of thestructure. Ties 14, upwardly extended, are pivotally connected at theirlower ends with the axle 11, the upper ends of the ties 14 beingthreaded as indicated at 15, to receive nuts 16, bearing upon a bridge17, extended transversely of, and adapted to bear upon the upper edgesof the bars 2 of the support 1.

The lower ends of the lower bars 10 of the yieldable frame 8 arepivotally connected by means of an axle 18, supporting for rotation, asheave 19.

A return line, denoted generally by the numeral 20, is connected withany suitable portion of the structure, the return line 20 being trainedabout a sheave 21, indicated diagrammatically and supported in anychosen way. The hauling line 22 extends across the upper portion of thetread of the sheave 19, one end of the hauling line 22 being connectedwith the log or like object, indicated at 23.

In practical operation, suppose that tension is applied to the haulingline 22, in the direction of the arrow A and that the log 23 is draggingalong the ground. Under the circumstances above pointed out, the sheave19 will be drawn downwardly, swinging the upper ends of the lower bars10 together and causing the adjacent, connected ends of the bars 9 tomove upwardly, thus effecting a raising of a secondary pulley 12. Whenthe secondary pulley 12 is raised in the manner above described, thecable-way 5 will. be pinked or curved, between the pulleys 12 and 4t,and thus, the trolley will be prevented from moving longitudinally ofthe cable-way 5, in the direction of the arrow A. Ultimately, the log orlike object, indicated at 23, is lifted free from the ground, it beingunderstood that in practice, the log 23 is located at a much greaterdistance below the trolley than that shown in the drawings. When the log23 is no longer in frictional contact with the ground, the entiretension applied to the hauling line 22 will be made effective to movethe trolley and and the log 23 in the direction of the arrow A, towardthe log landing. The trolley may be hauled back along the cable way 5,by manipulating the return line 20.

By adjusting the nuts 16 upon the ties 17, the spaces existing betweenthe secondary pulley 12 and the primary pulleys l may be adjusted,thereby regulating the curvature of the cable-way 5 at the inception ofthe pull in the direction of the arrow A. upon the hauling line 22. InFigs. 3 and 4, the support is denoted by the numeral 2%, the sameconsisting of bars 25, connected at their ends by axles 26, supportingprimary pulleys 27. Downwardly extended links 28 are pivotally connectedwith the axles 26, the lower ends of the links 28 carrying axles 29upon. which secondary pulleys 30 are journaled, the axles 29 serving tosupport a yieldable frame 31, the secondary pulleys 30, thus, in effect,being carried by the frame 31. The frame 31 consists of converging pairsof bars 32, the lower ends of which are pivotally connected by an axle33, supporting a sheave 3a.

The track or cable-way is indicated by the numeral the primary pulleys27 engaging the upper edge of the cable-way. Another primary pulley 36may be located between the primary pulleys 27, the last mentionedprimary pulley 36 being journaled for rotation on an axle 37 supportedby and con necting the bars of the support 24:. Up wardly extending ties88 are pivotally con nected at their lower ends with the axles 29, andthe ties 38 carrying nuts 39, engaging bridges 40, bearing upon theupper edges of the bars of the support 24:. The return line is indicatedby the numeral ll, the same being trained about a pulley l2, supportedin any desired manner. The hauling line is indicated by the numeral 43,and the log or like object is indicated by the numeral 44.

In that form of the invention last above described, it will beunderstood that by retating the nuts 39, the ties 38 may be raised andlowered, and thus the relative vertical relation existing between thepulleys 30, 36 and 27 may be altered. so as to regulate the curvature ofthe cable-way 25.

line 4-3 in the direction of the arrow A, the log or like object 4 fwill first be drawn along the ground, and then will be elevated. So longas the log 41%. is in cont act with the ground, the trolley will remainstationary, but so soon as the frictional engagement be tween the log tiand the groiiind is broken, the trolley will move in the direct-ion ofthe arrow A, the log a l being thereby carried toward the log landing.The trolley may be returned to its original position by means of theline 41.

It is to be noted, referring to Fig, 1, that. the grip upon thecable-way 5, afforded by the pulleys l: and 12 is released when thetrolley no longer supports the weight. In that form of the inventionwhich is shown in Fig. 3, the grip of the several pulleys 2T, 36 andupon the cable-way remains constant, except when the ties 38 areadjusted. When the return line is manipulated by hand, the form shown inFig. 1 will be the more acceptable, owing to the small amount of powerrequired to haul the trolley back to its original position.

In both forms of the invention, oil cups 45 may be provided at any andall points where lubrication is desired.

Having thus described the invention, what is claimed is z- 1. ln deviceof the class described; a support; primary pulleys carried by thesupport; a yieldable frame located below the support; a secondary pulleycarried by the yieldable frame; a sheave carried by the yieldable framebelow the secondary pulley; links connecting the yieldable frame withthe support; and adjustable means for varying the relative positions ofthe frame and the support to move the secondary pulley toward and awayfrom the primary pulleys.

2. In a device of the class described, a support; primary pulleyscarried by the support; a yieldable frame located below the support; asecondary pulley carried by the yieldable frame; a sheave carried by theyieldable frame below the secondary pulley; links connecting theyieldable frame with the support; a tie connected with the yieldableframe; and adjustable means on the tie for engaging the support to movethe sec ondary pulley toward and away from the primary pulleys.

3. In a device of the class described, a support; primary pulleyscarried by the sup port; a quadrilateral frame located below thesupport; links connecting the ends of the frame with the support; asecondary pulley located at one angle of the frame; and a sheave locatedat the opposite angle of the frame.

4. In a device of the class described, a support; primary pulleyscarried by the supl i hen tension is applied to the hauling port; aquadrilateral framelocatedbelow the support; links connecting the endsof the In testimony that I claim the foregoing as frame With thesupport; a secondary pulley my own, I have hereto affiXed my signaturelocated at one angle of the frame; a sheave in the presence of twoWitnesses.

located at the opposite angle of the frame; BENJAMIN SHEPHARD SPAULDING.and an adjustable connection between the Witnesses: v

first specified angle of the frame and the MARION F. STOKES,

support. SIDNEY S. LOWENTHAL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

